GPT-5.5 Pro API Pricing
Short answer
GPT-5.5 Pro costs $30.00 per 1M input tokens and $180.00 per 1M output tokens . Context window: 1,050,000. Last verified 2026-06-17 from openrouter.ai. Confidence: Verified.
GPT-5.5 Pro is OpenAI's premium maximum-reasoning tier, priced well above GPT-5.5 with no cached-input discount.
Input
$30.00 /1M
Output
$180.00 /1M
Cached input
— /1M
Input pricing$30.00
Output pricing$180.00
Limits & capabilities
Context window1,050,000
Max output128K
Modalitytext + image input, text output
ChannelOpenRouter
ProviderOpenAI
Best for
ReasoningHigh-stakes
No cached-input rate. Not yet listed on Azure Foundry as of the checked date.
Last checked Verified
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